Thrips Control

— Written By blrobins

I’ll send you things periodically as I think about them. I know it is early to think about thrips control and early season stands in peanuts, but here are two data tables I placed in the peanut book this year. One demonstrates the value of a seed treatment at each planting date. I know growers are planting treated seed but there are some interested in organic production. Also, I very often see mid-May or late-May planted peanuts out yield early planted peanuts and these data show that. On a large farming operation I understand why people push the window and plant early and I know if you shoot for mid-May you may not get panted until June, but the numbers do reflect some differences we are seeing.

We had a lot of thrips damage this past year, and the second table shows how one insecticide application, either Thimet or Orthene, did not control thrips completely and protect yield as well as two insecticide applications. The acephate spray was well-timed and was within 2 weeks of peanut emergence. I think the Thimet would look better than Orthene if the Orthene was sprayed a week or two later which is probably more common among growers. People very often are not that timely and often spray late, either because of weather or just not looking close and observing thrips damage. I do think two sprays of Orthene (1 and 3 weeks after emergence) may have done as well as Thimet followed by Orthene. BUT, that is almost impossible logistically due to weather and acreage and other things going on in May. AND, we do a lot of things right (and wrong) in research plots, but one thing we can often do well is be timely – small plots and backpacks often remove the weather and logistical issues farmers face.

Going back to the twin row discussion, I don’t think farmers in the southeast see as much thrips damage as we do in the V-C or at least the yield decreases from the damage because they have “extra time” on their side and can wait for the crop to mature.

Rick, Barbara, and I are working on these projects together.

2014-9-Table1 2014-9-Table2

Article first appeared as North Carolina Peanut Note (PNNC-2014-009)